handle duplicate events

handle duplicate events since dbtext doesn't support transactions

kamailio/presence-role.cfg

@@ -1,4 +1,6 @@
 ######## Presence server module ########
+modparam("htable", "htable", "p=>size=32;autoexpire=600;")
+
 loadmodule "presence.so"
 loadmodule "presence_dialoginfo.so"
 loadmodule "presence_mwi.so"
@@ -82,10 +84,22 @@ route[HANDLE_PUBLISH]
 
 event_route[kazoo:consumer-event-presence-update]
 {
-    xlog("L_INFO", "received $(kzE{kz.json,Event-Package}) update for $(kzE{kz.json,From}) $kzE");
-    kazoo_pua_publish($kzE);
-    pres_refresh_watchers("$(kzE{kz.json,From})", "$(kzE{kz.json,Event-Package})", 1);
-    
+    if( $(kzE{kz.json,Event-Package}) == "dialog") {   
+        if($sht(p=>$(kzE{kz.json,Call-ID})) != $(kzE{kz.json,State})) {
+             xlog("L_INFO", "received $(kzE{kz.json,Event-Package}) update for $(kzE{kz.json,From}) $kzE");
+             xlog("L_INFO", "payload $kzE");
+             $sht(p=>$(kzE{kz.json,Call-ID})) = $(kzE{kz.json,State});
+             kazoo_pua_publish($kzE);
+             pres_refresh_watchers("$(kzE{kz.json,From})", "$(kzE{kz.json,Event-Package})", 1);
+        } else {
+            xlog("L_INFO", "received duplicate $(kzE{kz.json,Event-Package}) update for $(kzE{kz.json,From}) $kzE");
+            xlog("L_INFO", "payload $kzE");
+        } 
+    } else {
+       xlog("L_INFO", "received $(kzE{kz.json,Event-Package}) update for $(kzE{kz.json,From}) $kzE");
+       kazoo_pua_publish($kzE);
+       pres_refresh_watchers("$(kzE{kz.json,From})", "$(kzE{kz.json,Event-Package})", 1);
+    }
 }
 
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